abstract
Needle-shaped goethite (? , goethite xH2O0. 1 "x" 0.22), the aspect ratio of goethite particles is ≥ 10, and the narrow particle size distribution is related to.
Length? 0.5 ? Form-controlling cationic additives in air ferric hydroxide XH2O (80 "X" 120) prepared from rice.
(on 0.0 1. Pd2+ or Rh3+). The growth of goethite particles produces Fe (OH) 2 XH2O oxidized in the middle stage.
Nuclear amorphous iron hydroxide [FeOx (Oh) 3-2 yH2O] and its growth? Goethite (water) × acicular particles
X-ray diffraction (XRD) and transmission electron microscopy (TEM) were used to study the auxiliary morphology control agent.
Additives are preferentially adsorbed on some crystals of aircraft, which hinders the longitudinal economic growth, so that
Particles get needles to form high aspect ratio? 10 。 Thermal analysis shows that the sample of goethite exceeds the weight loss.
( ? 3-4%), goethite samples. The vibration generated by the presence of hydrogen, oxygen and hydrogen strongly absorbs water molecules.
Infrared spectrum proved the existence and non-existence of goethite. Water molecules are located in the goethite chain.
The channel formed between the two bands of FeO6 octahedron is parallel to the c-axis goethite, and water molecules are in it.
Narrow the adjacent cations between them.